this research was carried out to define the morphological features of meckel’s diverticulum (md) induck and to investigate whether the md resides in a constant position along the intestinal tract. for thispurpose, a total of 30 adult healthy ducks of both sexes, 50-52 weeks of age were used. after dissecting,some morphological factors such as: total intestine length as well as the lengths of th...

The convergent synthesis of a benzofuran analog of the carbacyclic ansa compound kendomycin has been achieved by assembling three major fragments by means of epoxide opening and directed ortho lithiation. The crucial tetrahydropyran ring was formed by a highly stereoselective cationic cyclization. Analysis of all synthesized tetrahydropyran-arene compounds reveals a hindered sp(2)-sp(3) rotatio...

A highly stereocontrolled, convergent total synthesis of kendomycin [(-)-TAN2162], an ansa-macrocyclic antibiotic, is reported. The key of the strategy is an unprecedented Tsuji-Trost macrocyclic etherification, followed by a transannular Claisen rearrangement to construct the 18-membered carbocyclic framework. The oxa-six- and five-membered rings were also stereoselectively constructed respect...

This research was carried out to define the morphological features of Meckel’s diverticulum (MD) induck and to investigate whether the MD resides in a constant position along the intestinal tract. For thispurpose, a total of 30 adult healthy ducks of both sexes, 50-52 weeks of age were used. After dissecting,some morphological factors such as: total intestine length as well as the lengths of th...